生态滤沟对城市路面径流的净化效果试验及模拟

发布时间：2018-05-16 01:31

本文选题：生物滞留 + 城市路面径流　；参考：《水科学进展》2016年06期

【摘要】：通过试验和模拟,研究生态滤沟对城市路面径流的净化效果及适宜工况。设计了半渗透型和防渗型两套生态滤沟试验系统,每套系统由5种典型填料滤沟组成。不同影响因素的多水平正交试验和单因素试验结果表明:填料组合方式是对整体处理效果影响最重要的因素,且以粉煤灰+沙(FS)为人工填料层的生态滤沟净化效果最好,防渗与半渗透型沟槽综合去除率分别为83.12%和73.18%,最佳淹没区高度为150 mm。建立了污染物(TN、TP)去除率、出水率与各影响因素的多元回归模型,经Nash-Suttcliffe系数和决定系数检验,拟合效果良好。采用Hydrus-1D模型对3种入流浓度下TP在生态滤沟系统中的迁移进行了模拟,TP出水浓度模拟值与实测值平均相对误差分别为14.11%、17.33%和26.57%,模拟结果可靠。
[Abstract]:Through experiment and simulation, the purification effect and suitable working condition of ecological filter ditch on urban road surface runoff were studied. Two ecological filtration ditch test systems, semi-permeable and impermeable, were designed. Each system was composed of five typical fillers. The results of multi-level orthogonal test and single factor test of different influencing factors showed that the combination of fillers was the most important factor affecting the overall treatment effect, and the ecological filter furrow purification effect was the best with fly ash sand (FS) as artificial filler. The comprehensive removal rates of impermeable and semi-permeable grooves were 83.12% and 73.18%, respectively, and the optimum height of the inundated area was 150 mm. A multivariate regression model was established for the removal rate of pollutants and the water extraction rate and the influencing factors. The results of Nash-Suttcliffe coefficient and determination coefficient test showed that the fitting effect was good. The Hydrus-1D model was used to simulate the transport of TP in the ecological filtration system under three inlet concentrations. The average relative error between the simulated and measured TP effluent concentration was 14.11% 17.33% and 26.57%, respectively. The simulation results were reliable.
【作者单位】：西安理工大学西北旱区生态水利工程国家重点实验室培育基地;
【基金】：国家自然科学基金资助项目(51279158) 陕西省自然科学基金重点资助项目(2015JZ013)~~
【分类号】：X52

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